Abstract
Here first a 2D dual-metal (Co/Zn) and leaf-like zeolitic imidazolate framework (ZIF-L)-pyrolysis approach is reported for the low-cost and facile preparation of Co nanoparticles encapsulated into nitrogen-doped carbon nanotubes (Co-N-CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF-L is the key to the emergence of the encapsulated microstructure. Specifically, high-dispersed cobalt nanoparticles are fully encapsulated in the tips of N-CNTs, leading to the full formation of highly active Co–N–C moieties for oxygen reduction and evolution reactions (ORR and OER). As a result, the obtained Co-N-CNTs present superior electrocatalytic activity and stability toward ORR and OER over the commercial Pt/C and IrO2 as well as most reported metal-organic-framework-derived catalysts, respectively. Remarkably, as bifunctional air electrodes of the Zn–air battery, it also shows extraordinary charge–discharge performance. The present concept will provide a guideline for screening novel 2D metal-organic frameworks as precursors to synthesize advanced multifunctional nanomaterials for cross-cutting applications.
| Original language | English |
|---|---|
| Article number | 1705048 |
| Journal | Advanced Functional Materials |
| Volume | 28 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 31 Jan 2018 |
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Keywords
- 2D and leaf-like zeolitic imidazolate frameworks
- bifunctional air electrodes
- cobalt–nitrogen–carbon nanotubes
- rechargeable zinc–air batteries
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Condensed Matter Physics
- Electrochemistry
Cite this
2D Dual-Metal Zeolitic-Imidazolate-Framework-(ZIF)-Derived Bifunctional Air Electrodes with Ultrahigh Electrochemical Properties for Rechargeable Zinc–Air Batteries. / Wang, Tingting; Kou, Zongkui; Mu, Shichun; Liu, Jingping; He, Daping; Amiinu, Ibrahim Saana; Meng, Wen; Zhou, Kui; Luo, Zhixiong; Chaemchuen, Somboon; Verpoort, Francis.
In: Advanced Functional Materials, Vol. 28, No. 5, 1705048, 31.01.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - 2D Dual-Metal Zeolitic-Imidazolate-Framework-(ZIF)-Derived Bifunctional Air Electrodes with Ultrahigh Electrochemical Properties for Rechargeable Zinc–Air Batteries
AU - Wang, Tingting
AU - Kou, Zongkui
AU - Mu, Shichun
AU - Liu, Jingping
AU - He, Daping
AU - Amiinu, Ibrahim Saana
AU - Meng, Wen
AU - Zhou, Kui
AU - Luo, Zhixiong
AU - Chaemchuen, Somboon
AU - Verpoort, Francis
PY - 2018/1/31
Y1 - 2018/1/31
N2 - Here first a 2D dual-metal (Co/Zn) and leaf-like zeolitic imidazolate framework (ZIF-L)-pyrolysis approach is reported for the low-cost and facile preparation of Co nanoparticles encapsulated into nitrogen-doped carbon nanotubes (Co-N-CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF-L is the key to the emergence of the encapsulated microstructure. Specifically, high-dispersed cobalt nanoparticles are fully encapsulated in the tips of N-CNTs, leading to the full formation of highly active Co–N–C moieties for oxygen reduction and evolution reactions (ORR and OER). As a result, the obtained Co-N-CNTs present superior electrocatalytic activity and stability toward ORR and OER over the commercial Pt/C and IrO2 as well as most reported metal-organic-framework-derived catalysts, respectively. Remarkably, as bifunctional air electrodes of the Zn–air battery, it also shows extraordinary charge–discharge performance. The present concept will provide a guideline for screening novel 2D metal-organic frameworks as precursors to synthesize advanced multifunctional nanomaterials for cross-cutting applications.
AB - Here first a 2D dual-metal (Co/Zn) and leaf-like zeolitic imidazolate framework (ZIF-L)-pyrolysis approach is reported for the low-cost and facile preparation of Co nanoparticles encapsulated into nitrogen-doped carbon nanotubes (Co-N-CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF-L is the key to the emergence of the encapsulated microstructure. Specifically, high-dispersed cobalt nanoparticles are fully encapsulated in the tips of N-CNTs, leading to the full formation of highly active Co–N–C moieties for oxygen reduction and evolution reactions (ORR and OER). As a result, the obtained Co-N-CNTs present superior electrocatalytic activity and stability toward ORR and OER over the commercial Pt/C and IrO2 as well as most reported metal-organic-framework-derived catalysts, respectively. Remarkably, as bifunctional air electrodes of the Zn–air battery, it also shows extraordinary charge–discharge performance. The present concept will provide a guideline for screening novel 2D metal-organic frameworks as precursors to synthesize advanced multifunctional nanomaterials for cross-cutting applications.
KW - 2D and leaf-like zeolitic imidazolate frameworks
KW - bifunctional air electrodes
KW - cobalt–nitrogen–carbon nanotubes
KW - rechargeable zinc–air batteries
UR - http://www.scopus.com/inward/record.url?scp=85037331220&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85037331220&partnerID=8YFLogxK
U2 - 10.1002/adfm.201705048
DO - 10.1002/adfm.201705048
M3 - Article
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 5
M1 - 1705048
ER -